\begin{first}
	body of the environment body of the environment body of the environment
\end{first}%
some more text

\begin{second}
	body of the environment body of the environment body of the environment
\end{second} % comment!

\begin{third}
	body of the environment body of the environment body of the environment
\end{third}% comment!

here is some text
\begin{equation}
	x^2
\end{equation}%
text
